If I understand your question, the response you are looking for is in the prematch of the last OK.

Something like this:

#!/usr/bin/perl 

use strict; # https://www.perlmonks.org/?node_id=11155061
use warnings;
use Net::Telnet ();

my $host='192.168.1.13'; # FIXME
my $t;
my $oid;

{$t = new Net::Telnet (Timeout => 10,Input_log => "received_data.txt" 
+,
                      Port => 12345,  # FIXME
                      Prompt => '/bash\$ $/');
$t->open($host);
$t->print("AT");  #this is just used to make sure it connects##
$t->waitfor('/AT/');  #this is just an echo back of what is sent##
$t->waitfor('/OK/i');  #send this to say I'm ready##
}

{$t->print("AT%23=1234");  #This basically the password to the system#
+#
$t->waitfor('/AT%23=1234/i');  #Echo back##
$t->waitfor('/OK/i');
}
{
$oid = $t->print("AT1122");  #This is the command to see the state##
$oid = $t->waitfor('/AT1122/i');  #Echo back##
#$oid = $t->waitfor('//');  #this could be 0,1,2...need to converto oi
+d###
#                           #Need this value to check state in SNMP##
my ($returnedvalue, $match) = $t->waitfor('/OK/i');  
$returnedvalue =~ tr/0-9//cd; # delete everything except digits
print "this is what I think you are looking for: $returnedvalue\n";
}
$t->close()
[download]

Outputs:

this is what I think you are looking for: 2
[download]

Note: a few tweaks were made to run it on my machine...

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